295 Results for: "Sodium carbonate "

Starting materials:
Solution A. Copper sulfate R/ Water R
Solution B. anhydrous Sodium carbonate R / Potassium sodium tartrate R/ Sodium hydrogen carbonate R/ anhydrous Sodium sulfate R/ Water R

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Organic reference standard, Orange II sodium salt, analytical standard, Supelco®

Supplier: Merck

Orange II sodium salt can undergo oxidation by hydrogen peroxide, which is catalysed by ferric ion complexed to tetra amido macrocyclic ligands(FeIII–TAML activators) to give out carbon dioxide, carbon monoxide, small aliphatic carboxylic acids and phthalic acid as the major products.

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Arsenite solution Reag. Ph. Eur. 1008301

Supplier: VWR Chemicals

Composition: 0.5% arsenite, 2.0% sodium hydrogen carbonate

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Cupri-citric solution R1 Reag. Ph. Eur. 1023200

Supplier: VWR Chemicals

Starting materials: Copper sulfate R / Citric acid R / anhydrous Sodium carbonate R / Water R

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VWR®, Secondary reference standards for volumetric titration

Supplier: VWR Chemicals

The VWR® range of secondary reference standards offers extraordinary purity and homogeneity, and are perfectly suited for the verification factors for volumetric solutions.

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Sodium hydroxide

Supplier: WTW

Sodium hydroxide pellets is used as the carbon dioxide absorbent for BOD measurements

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Standard reference materials and buffer solutions, CertiPUR®, Supelco®

Supplier: Merck

Materials for the precise calibration and monitoring of pH instruments.

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1-Bromo-2-methoxyethane 96% stabilised

Supplier: Thermo Fisher Scientific

Stabilized with sodium carbonate

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Benzyl chloroformate 95% stabilised

Supplier: Thermo Fisher Scientific

Stabilized with ca 0.1% sodium carbonate

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Cinnamyl chloride 95% stabilised

Supplier: Thermo Fisher Scientific

Cinnamyl chloride is used in the enantioselective total synthesis of helioporins C and E, bioactive marine diterpenes
Stab. with sodium carbonate

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Isopentyl nitrite (mixed isomers ) 97% stabilised

Supplier: Thermo Fisher Scientific

Stabilized with 0.2% anhyd. sodium carbonate

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Glycolaldehyde diethyl acetal 98% stabilised

Supplier: Thermo Fisher Scientific

Stab. with ca 0.1% sodium carbonate, 98%

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Anti-SLC4A4 variant A Rabbit Polyclonal Antibody

Supplier: Bioss

SLC4A4 (Electrogenic sodium bicarbonate cotransporter 1) is an electrogenic sodium/bicarbonate cotransporter with a Na(+):HCO3(-) stoichiometry varying from 1:2 to 1:3. It may regulate bicarbonate influx/efflux at the basolateral membrane of cells and regulate intracellular pH. SLC4A4 interacts with carbonic anhydrase 2 and carbonic anhydrase 4 which may regulate transporter activity. There are four named isoforms produced by alternative splicing.This gene encodes a sodium bicarbonate cotransporter (NBC) involved in the regulation of bicarbonate secretion and absorption and intracellular pH. Mutations in this gene are associated with proximal renal tubular acidosis. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2008].

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Sodium Carbonate Anhydrous, Reference Standard

Supplier: USP

USP Reference Standards are specified for use in conducting official USP–NF tests and assays. USP also provides Reference Standards specified in the Food Chemicals Codex as well as authentic substances—high-quality chemical samples—as a service to analytical, clinical, pharmaceutical and research laboratories. To confirm accuracy and reproducibility, USP Reference Standards are rigorously tested and evaluated by multiple independent laboratories including USP, commercial, regulatory, and academic labs. USP also provide publicly available, official documentary standards for pharmaceutical ingredients in the USP–NF that link directly with our primary reference standards.

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VWR®, Certified Reference Materials for the standardisation of volumetric solutions

Supplier: VWR Chemicals

CRM's - secondary reference materials intended for standardisation of volumetric solutions in accordance with the Pharmacopoeia (Ph. Eur. and USP). These volumetric standards are prepared from high purity salts. Certified mass fraction is determined by classical analysis according to ISO/IEC 17025. Homogeneity and stability studies have been performed according to the requirements of ISO 17034 and ISO Guide 35. All volumetric standards are traceable to SI (NIST or BAM).